One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,13)(4,15)(5,12)(6,10)(7,11)(8,9)(14,16)(17,18)(19,28)(20,33)(21,38)(22,27)(23,26)(24,30)(25,36)(29,46)(31,40)(32,41)(34,45)(35,43)(37,44)(39,47)(42,48) involution — undirected(1,3)(2,8)(4,10)(5,15)(6,14)(7,9)(11,16)(12,13)(17,19)(18,24)(20,34)(21,31)(22,30)(23,32)(25,42)(26,40)(27,41)(28,38)(29,35)(33,39)(36,47)(37,48)(43,45)(44,46) involution — undirected(1,4,6,8)(2,9,10,15)(3,12,14,11)(5,13,7,16)(17,20,23,37)(18,25,26,43)(19,29,32,47)(21,35,22,36)(24,39,40,46)(27,44,38,33)(28,45,41,42)(30,34,31,48)(2,10)(3,14)(9,15)(11,12)(18,26)(24,40)(25,43)(27,38)(28,41)(33,44)(39,46)(42,45) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.